Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already cover read-only, idempotent, non-destructive and open-world. The description adds genuinely new behavioral information beyond those: a concrete cost of $0.010 and the fact that payment instructions are returned with no provider account needed. It does not say what happens on an unsupported or aggregate code.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded and reasonably short, but the closing sentence about 'payment instructions for the Saylor endpoint' introduces unexplained jargon that forces the agent to infer what it means, and cost/returned-value statements could be ordered more cleanly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

There is no output schema, so the description carries the burden of listing returned fields and it does so explicitly; it also discloses pricing. For a one-parameter lookup tool this is nearly complete, with only error/failure behavior left unspecified.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the single parameter already documents the two-letter code format, examples, and exclusion of aggregates. The description only restates 'two-letter country code,' adding no syntax or validation detail beyond the schema, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb ('Resolve') and resource ('two-letter country code') and enumerates the returned attributes (World Bank name, region, capital, income group, lending classification). It does not distinguish itself from the similar sibling get_economy_report, so it falls short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The phrase 'for data enrichment' implies a usage context, but there is no explicit when-to-use or when-not-to-use guidance, and no mention of how this differs from get_economy_report or get_fx_report, which an agent would plausibly confuse it with.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.